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Pollution Levels in Lake Erie Have Been Modeled by the Equation

Question 50

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Pollution levels in Lake Erie have been modeled by the equation Pollution levels in Lake Erie have been modeled by the equation , where x is the volume of pollutants (in cubic kilometers) and t is the time (in years) (Adapted from R. H. Rainey, Science 155 (1967) , 1242-1243) . Find the initial pollution level; that is, find x when . ​ A) 0.23 km<sup>3</sup> B) 0.1 km<sup>3</sup> C) 0.40 km<sup>3</sup> D) 0.20 km<sup>3</sup> E) 0.7 km<sup>3</sup> , where x is the volume of pollutants (in cubic kilometers) and t is the time (in years) (Adapted from R. H. Rainey, Science 155 (1967) , 1242-1243) . Find the initial pollution level; that is, find x when Pollution levels in Lake Erie have been modeled by the equation , where x is the volume of pollutants (in cubic kilometers) and t is the time (in years) (Adapted from R. H. Rainey, Science 155 (1967) , 1242-1243) . Find the initial pollution level; that is, find x when . ​ A) 0.23 km<sup>3</sup> B) 0.1 km<sup>3</sup> C) 0.40 km<sup>3</sup> D) 0.20 km<sup>3</sup> E) 0.7 km<sup>3</sup> . ​


A) 0.23 km3
B) 0.1 km3
C) 0.40 km3
D) 0.20 km3
E) 0.7 km3

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